Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 04S804-214 found under Valve Safety Relief by A W Chesterton Company. The National Stock Number assigned to this part is 4820003049378, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 04S804-214.